﻿//////////////////////////////////////////////
/// 2DxFX - 2D SPRITE FX - by VETASOFT 2015 //
/// http://unity3D.vetasoft.com/            //
//////////////////////////////////////////////

Shader "2DxFX/Standard/EdgeColor"
{
Properties
{
_MainTex ("Base (RGB)", 2D) = "white" {}
_Distortion ("Distortion", Range(0,1)) = 0
_Alpha ("Alpha", Range (0,1)) = 1.0
_Color ("_Color", Color) = (1,1,1,1)
_ColorX ("Tint", Color) = (1,1,1,1)

// required for UI.Mask
_StencilComp ("Stencil Comparison", Float) = 8
_Stencil ("Stencil ID", Float) = 0
_StencilOp ("Stencil Operation", Float) = 0
_StencilWriteMask ("Stencil Write Mask", Float) = 255
_StencilReadMask ("Stencil Read Mask", Float) = 255
_ColorMask ("Color Mask", Float) = 15


}

SubShader
{

Tags {"Queue"="Transparent" "IgnoreProjector"="true" "RenderType"="Transparent"}
ZWrite Off Blend SrcAlpha OneMinusSrcAlpha Cull Off
// required for UI.Mask
Stencil
{
Ref [_Stencil]
Comp [_StencilComp]
Pass [_StencilOp] 
ReadMask [_StencilReadMask]
WriteMask [_StencilWriteMask]
}


Pass
{

CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma fragmentoption ARB_precision_hint_fastest
#pragma target 3.0
#include "UnityCG.cginc"

struct appdata_t
{
float4 vertex   : POSITION;
float4 color    : COLOR;
float2 texcoord : TEXCOORD0;
};

struct v2f
{
half2 texcoord  : TEXCOORD0;
float4 vertex   : SV_POSITION;
fixed4 color    : COLOR;
};


sampler2D _MainTex;
float _Distortion;
float4 _ColorX;

fixed _Alpha;
	
v2f vert(appdata_t IN)
{
v2f OUT;
OUT.vertex = mul(UNITY_MATRIX_MVP, IN.vertex);
OUT.texcoord = IN.texcoord;
OUT.color = IN.color;

return OUT;
}

float4 getPixel(in int x, in int y, v2f i)
{
	return tex2D(_MainTex, ((i.texcoord.xy ) + float2(x, y)/64.0));
}

float4 frag (v2f i) : COLOR
{
 		 fixed4 sum = abs(getPixel(0, 1, i) - getPixel(0, -1, i));
				sum += abs(getPixel(1, 0, i) - getPixel(-1, 0, i));
				sum /= 2.0;
				fixed4 color = getPixel(0, 0, i)*i.color;
				color += length(sum) * _ColorX;
				color.a = color.a*(1-_Alpha);
				return color;
	
}

ENDCG
}
}
Fallback "Sprites/Default"

}